I have setup 10.0.0.5 as the "Default Server" in the NAPT configuration of my SpeedTouch router. You can without a problem connect to my server on http, but I cannot make a http connection to my external IP adres (or hostname) from within my LAN.
So, on lilium, I try:
$lynx pietje.xs4all.nl or $lynx 80.101.175.113
lynx outputs:
Making HTTP connection to 80.101.175.113
And that's it.
$ lynx localhost does work without a problem